Matters needing attention when choosing a lightning arrester:

1. Recognize the power distribution system of the lightning arrester

Before installing the lightning arrester, you must first know your power distribution system, whether it is a TT, TN or IT system. Only by clarifying the power distribution system can you determine single-phase, three-phase, wiring methods, etc., and clarify where the product is installed. Choose the right lightning protection device.

2, it is necessary to know the important parameters of the lightning arrester

The parameters of the lightning protection device are very important, and understanding the parameters and their meaning is the key to the selection of the lightning protection device. You need to know the following parameters: (1) Nominal voltage Un: The rated voltage of the protected system matches. In the information technology system, this parameter indicates the type of protector that should be selected. It marks the effective value of AC or DC voltage. (2) Rated voltage Uc: The maximum effective value of the voltage that can be applied to the designated end of the protector for a long time without causing changes in the protector characteristics and activation of the protection element. (3) Rated discharge current Isn: The peak value of the maximum impulse current that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied to the protector for 10 times. (4) Maximum discharge current Imax: When a standard lightning wave with a waveform of 8/20μs is applied to the protector once, the maximum impulse current peak value that the protector can withstand. (5) Voltage protection level Up: the maximum value of the protector in the following tests: 1KV/μs slope flashover voltage; residual voltage of the rated discharge current.

3. See the lightning protection device test report of the lightning protection device manufacturer

When choosing a lightning protection device, you must choose products that have passed the inspection of the lightning protection center, and the safety performance is guaranteed. When choosing a manufacturer, pay attention to the strength of the manufacturer and try to choose a manufacturer with many years of lightning protection experience, so that the lightning protection device can be guaranteed after sale.